Almost half of the Montreal metro's green line is down as emergency crews intervene on the site of a medical emergency. The affected stations are those between the busy Berri-UQAM and the eastern terminus at Honoré-Beaugrand. The STM shared news of the shutdown on both its website and the ligne verte Twitter account.\nAt the time of writing, service is expected to resume at 16:15, before the peak of the afternoon commute. The circumstances of the medical emergency are unclear.\nUPDATE: normal service has resumed on the green line.\nThis is the third major metro service interruption in the last two weeks. On November 14, a water main break flooded Square Victoria-OACI station, forcing the STM to stop service along the downtown stretch between stations Lionel-Groulx and Berri-UQAM.\nOn November 18, parts of the orange line and the entire blue line were shut down due to the presence of smoke. The blue line shutdown persisted for over an hour.\nShutdown GREEN line between Berri-UQAM and H-Beaugrand. Inter. Emergency medical services. Service expected to resume at 16:15. #stminfo O— Ligne Verte (@stm_Verte) November 21, 2019\nThe STM has established a special bus service between Berri-UQAM and Honoré-Beaugrand for the duration of the shutdown.\n[Interruption en cours] 🚇🚌⚠️ Un service spécial de bus s’installe entre Berri-UQAM et Honoré-Beaugrand. L'emplacement des arrêts de ces bus se trouve sur les plans de quartier affichés dans l'ensemble des stations. ⏩ https://t.co/ql5anQU3Yb pic.twitter.com/tKZSZedrDc— Ligne Verte (@stm_Verte) November 21, 2019\nNormal métro service #stminfo E— Ligne Verte (@stm_Verte) November 21, 2019\nUPDATE: As of 16:10, normal service has resumed on the green line.